CAMBRIAN (STRATIGRAPHY)
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BTPALAEOZOIC (STRATIGRAPHY)
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UDC551.731
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Descriptor GERKAMBRIUM (STRATIGRAPHIE)
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Descriptor ENGCAMBRIAN (STRATIGRAPHY)
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Descriptor FRECAMBRIEN (STRATIGRAPHIE)
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NTCADOMIAN OROGENY (STRATIGRAPHY)
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NTMIDDLE CAMBRIAN (STRATIGRAPHY)
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NTUPPER CAMBRIAN (STRATIGRAPHY)
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NTLOWER CAMBRIAN (STRATIGRAPHY)